MAIN: bump the minimum required Python version from 3.8 to 3.9

Author: dnicolodi

.cirrus.yml

@@ -55,12 +55,12 @@ manylinux-python3.13t_task:
     PATH: "/opt/python/cp313-cp313t/bin/:${PATH}"
   << : *test
 
-manylinux-python3.8_task:
+manylinux-python3.9_task:
   container:
     dockerfile: ci/manylinux.docker
     cpu: 1
   env:
-    PATH: "/opt/python/cp38-cp38/bin/:${PATH}"
+    PATH: "/opt/python/cp39-cp39/bin/:${PATH}"
   << : *test
 
 miniconda_task:

.github/workflows/tests.yml

@@ -50,8 +50,8 @@ jobs:
           - macos-13
           - windows-latest
         python:
-          - '3.8'
           - '3.13'
+          - '3.9'
         meson:
           -
         dependencies:
@@ -61,10 +61,6 @@ jobs:
             python: 'pypy-3.9'
           - os: ubuntu-latest
             python: 'pypy-3.11'
-          - os: ubuntu-latest
-            python: '3.8'
-          - os: ubuntu-latest
-            python: '3.9'
           - os: ubuntu-latest
             python: '3.10'
           # Test with older supported Meson version.  Meson up to

mesonpy/__init__.py

@@ -36,6 +36,8 @@
 import typing
 import warnings
 
+from functools import cached_property
+
 
 if sys.version_info < (3, 11):
     import tomli as tomllib
@@ -46,13 +48,12 @@
 import packaging.version
 import pyproject_metadata
 
-import mesonpy._compat
 import mesonpy._rpath
 import mesonpy._tags
 import mesonpy._util
 import mesonpy._wheelfile
 
-from mesonpy._compat import cached_property, read_binary
+from mesonpy._compat import read_binary
 
 
 try:
@@ -578,9 +579,7 @@ def _string_or_path(value: Any, name: str) -> str:
         'meson': _string_or_path,
         'limited-api': _bool,
         'allow-windows-internal-shared-libs': _bool,
-        'args': _table({
-            name: _strings for name in _MESON_ARGS_KEYS
-        }),
+        'args': _table(dict.fromkeys(_MESON_ARGS_KEYS, _strings)),
     })
 
     table = pyproject.get('tool', {}).get('meson-python', {})

mesonpy/_compat.py

@@ -6,7 +6,6 @@
 
 from __future__ import annotations
 
-import functools
 import importlib.resources
 import os
 import sys
@@ -19,12 +18,6 @@
     from typing import Collection, Iterable, Iterator, Mapping, Sequence
 
 
-if sys.version_info >= (3, 8):
-    from functools import cached_property
-else:
-    cached_property = lambda x: property(functools.lru_cache(maxsize=None)(x))  # noqa: E731
-
-
 if sys.version_info >= (3, 9):
     def read_binary(package: str, resource: str) -> bytes:
         return importlib.resources.files(package).joinpath(resource).read_bytes()
@@ -49,7 +42,6 @@ def read_binary(package: str, resource: str) -> bytes:
 
 
 __all__ = [
-    'cached_property',
     'read_binary',
     'Collection',
     'Iterable',

pyproject.toml

@@ -19,7 +19,7 @@ name = 'meson-python'
 version = '0.19.0.dev0'
 description = 'Meson Python build backend (PEP 517)'
 readme = 'README.rst'
-requires-python = '>= 3.8'
+requires-python = '>= 3.9'
 license = 'MIT'
 license-files = ['LICENSES/MIT.txt']
 keywords = ['meson', 'build', 'backend', 'pep517', 'package']